How to fill in a PDF form without printing it

To fill in a PDF form without printing it, open it in a PDF editor, type into the boxes if the form has them, or add text on top of the page if it does not. Check every answer, flatten the form so the values stay put, sign if the form needs a signature, and open the saved file in a second viewer before you send it.

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Fillable or flat: how to tell

A form is either fillable or flat, and the difference decides how you work.

A fillable form has real form fields: boxes with a name behind them, which hold a value. Click one and a text cursor appears inside it. Some viewers also shade the fields or show a message saying the form can be filled in.

A flat form is only a picture of a form. Its lines and boxes are drawn on the page, and nothing inside them is a field. Clicking does nothing useful, and you have to place each answer yourself.

You can usually tell in a few seconds by clicking the first answer box. If it is a field, type into it. If it is not, use the text tool.

Filling a fillable form

Click the field and type. Use the Tab key to move to the next field, and check that the form has accepted each value. Some fields only take numbers, or only a fixed date format, and will reject anything else.

For tick boxes and radio buttons, click once to select. If a choice is unclear, do not guess: a ticked box can mean a different answer from the one you meant. Read the question again.

Filling a flat form

Use the text tool to place your answer. Click where the answer goes, type, and drag the text box so it sits on the line. Use the same font size for the whole form, so the answers look as if they belong there, and keep each answer short enough to fit between the lines.

Tick and cross marks are placed the same way. Dates need extra care: write them in the format the form asks for, and spell the month out if you can. A date such as 03/04/2026 means 3 April in the UK and 4 March in the US, so an unclear date can be read the wrong way round. Writing 3 April 2026 avoids that.

Names should match the spelling on your identity document. An abbreviation or a missing middle name can cause the form to be returned.

Flatten before you send

Once a form is filled in, flatten it. Flattening combines the answers and the form fields into the page itself, so the values stay where you put them and cannot be edited as fields by the next person who opens the file. It also stops values from disappearing in a viewer that does not draw form fields.

Flattening does not lock the file. Anyone with a PDF editor can still change the page content, and a flattened form is no longer a fillable form. So check every answer first, and keep an unflattened copy in case you need to correct something.

If the recipient needs a fillable form, ask them before you flatten it.

Signing the form

If the form asks for a signature, use the sign tool to draw or type your signature and place it on the page. That is a picture of a signature, not a certified electronic signature, so for forms where a legal signature matters, check what the form asks for. The difference between a drawn signature and an electronic signature is explained in the signature image guide. The steps for signing without printing are in the sign-without-printing guide.

Sign after flattening only if the recipient's system accepts a signed, flattened file. Otherwise sign before flattening.

Check the result in a second viewer

A form can look right in one viewer and wrong in another, because viewers draw fonts and fields differently. Before you send it, open the saved file in a second viewer, such as a different browser or your phone's PDF app. Check that:

• every answer is where you expect it, and none has moved off the line
• ticks and dates show, and no text is cut off at the edge of a box
• the signature is on the right page and line
• the page count is what you expect

If something is missing in the second viewer, the answer may have been placed as a field that the second viewer does not draw. Flatten the form and open it again.

Quick answers

Can I fill a form on my phone? Yes, with a PDF app that supports form fields or text boxes. Check that the answers appear in another app before you send.

Should I keep the original blank form? Yes. Save the filled version under a new name, so you still have the blank copy if you need to start again.

What if the form asks for a handwritten signature? Then the form wants a signature that you make by hand. A typed name or an image placed on the page may not count. Check the form's instructions or ask the recipient.